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Income Taxes (Details Narrative) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Income tax, description | Effective January 1, 2018, among other changes, the Tax Act (1) reduces the U.S. federal corporate tax rate from 35 percent to 21 percent |  |
Income tax rate, percentage | 21.00% |  |
Valuation allowance, during period | $ 42,117 | $ 27,568 |
Increase (decrease) in valuation allowance | 14,549 | $ 1,505 | $ (5,641)
Due to Decrease in Federal Corporate Tax 21% [Member] |  |  |
Increase (decrease) in valuation allowance |  |  | 10,848
New Jersey [Member] |  |  |
Net operating loss carryforwards | $ 46,480 |  |
Net operating loss carryforwards, expiration | 2038 |  |
Income tax credits sold, during period |  |  | $ 332
Seller's allocation factor, percentage |  |  | 6.20%
Seller's allocation factor, value |  |  | $ 311
U.S. Federal Income Tax [Member] |  |  |
Net operating loss carryforwards, expiration | Substantially all of the net operating loss carryforwards expire from 2021 through 2037 for pre-2018 federal net operating loss carryforwards and from 2019 through 2038 for state purposes. |  |
U.S. Federal Income Tax [Member] |  |  |
Net operating loss carryforwards | $ 90,690 |  |
State and Local Jurisdiction [Member] |  |  |
Net operating loss carryforwards | 161,101 |  |
Foreign Tax Authority [Member] |  |  |
Net operating loss carryforwards | $ 64,142 |  |

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- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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